Megger: "Touch voltage contact point" WTF?

[1Justin]

I've used my MFT1720 for a couple of years now and have no problems, but have never understood what the buttony-thing on the front with the little earthed man was supposed to be for.

Megger call it a "Touch Voltage Contact Point".. and that's it... No other information anywhere in any of their manuals as far as I can figure out, and Google searches come up fruitless.

I understand "Touch Voltage", but what's the "contact point" all about?

I suspect it does nothing, some sort of idea which ever happened.. or am I wrong?

 

[ArseyDee]

Edit: Removed

 

[1Justin]

Hi ArseyDee.

I was aware the Touch Voltage is adjustable (I have never changed it), the the instrument won't test where the voltage would rise above.
But it's got-at in the set-up menu which is the spanner. The left knob set to the black funnel-shape thing with the earthed man "button" seems to do nothing on my 1720

 

[1Justin]

.. And there is a slight lump in the plastic film at the little man, almost as if something is under there!

 

[ArseyDee]

I've confused myself now. Is the settings menu on the left knob or right knob? Is that funnel shaped setting for earth electrode testing?

 

[ArseyDee]

I now think it has something to do with touch voltage limits for earth electrode testing. Still not sure it's a functional 'button' though.

I can PM the name and number of a good guy at Megger. He's sh!t hot on the 1700 series.

 

[kingeri]

If it's owt like the touch pad on my Robin KTS 1630, then when you touch it when the tester is connected to a live circuit, it will warn you if the touch voltage on the CPC is above a certain level, on mine it is not adjustable but is set at 50v, which makes sense as that is the maximum voltage that is considered safe.